It's alleged that someone deliberately tried to start a fire at the entrance of a shop in town while a member of staff was inside.
The front door of Dorset Street Stores was damaged just after 6:30am on Wednesday morning when the shop opened.
Police say the damage caused was only minimal and no-one was injured.
Officers want to speak to anyone who was in the area between 6:15-7am yesterday who might have seen what happened.
Anyone with information is asked to call 01534 612612 or Crimestoppers anonymously.


Jersey's first Christmas Tractor Run raises more than £10k
Finish line looms for school's Advent Challenge
£1 million into Jersey sport in 2026
Channel Islands could technically have a White Christmas
Cocaine importer jailed for six years 9 months
Details announced of free childcare for two and three year olds
18-year-olds to have access to Jersey social housing
CI ferry operators to work together to improve inter-islands travel